To prevent noise being transmitted from a rotor portion of an electric motor (2-2.3) through the bearing brackets (3) to the motor's housing (1), each bearing bracket (3) is fixed relative to the motor housing (1) by at least one mounting part (5), with a noise damping part (4) arranged in between the bearing bracket (3) and the motor housing (1). The mounting part (5) rests directly against the motor housing (1) in the region where the mounting part (5) is coupled to the motor housing (1), without any noise damping part interposed between the mounting part (5) and the motor housing (1).